Dowling, Noel T., author
Foundation Press, 1954
Buku Teks
Nowak, John E., author
Thomson/West, 2010
Buku Teks
Barron, Jerome A., author
West, 2009
Buku Teks
Smith, Glenn C., author
John Wiley & Sons, 2012
Buku Teks
Tribe, Laurence H., author
Foundation Press, 1978
Buku Teks